Math & Science ⇒ text above and below like summation

[stargoo]

I want to put text above and below a symbol (\cup) just like I would for a summation. caret and underscore doesn't work. Anyone know a way to do this?

Thanks,
Scott

[drowsy]

Use \bigcup. Unless it is a $$...$$$ formula you also have to use \displaystyle{...}.

[stargoo]

Worked perfect. Thank you!

[gmedina]

Hi,

I want to put text above and below a symbol (\cup) just like I would for a summation. caret and underscore doesn't work. Anyone know a way to do this?...

As drowsy suggested, using \bigcup allows the placement of subscripts and superscripts; however, using the starred form of the \DeclareMathOperator command (provided by the amsmath package), you can get subscripts and superscripts working with a command that emulates \cup, as the following example suggests:

Code: Select all

\documentclass{report}
\usepackage{amsmath}

\DeclareMathOperator*{\mycup}{\cup}

\begin{document}

text text $\mycup_{i=1}^{n-2}$ text text text

text text $\mycup\limits_{i=1}^{n-2}$ text text text

\[ \mycup_{i=1}^{n-2} \]

\end{document}

Please refer to the amsmath documentation for details (section 5 Operator Names, pages 17 and 18).

...Unless it is a $$...$$$ formula you also have to use \displaystyle{...}.

The $$...$$ construct is obsolete and shouldn't be used anymore (see reasons in l2tabu); in its stead it is preferable to use \[...\].

[stargoo]

I like the DeclareMathOperator. Very nice. I hadn't seen l2tabu. I'd say that it's an essential read for any newbie or advanced user. I've been using doublespace and the old version of caption for the last year (still rather newbie-ish in all this) and never realized they were obsolete.

[drowsy]

The $$...$$ construct is obsolete and shouldn't be used anymore

I know... sigh... I just wanted to say it fast.
Kind of boring to type begin{equation} and \[\] looks ugly and confusing.

[gmedina]

The $$...$$ construct is obsolete and shouldn't be used anymore

I know... sigh... I just wanted to say it fast.
Kind of boring to type begin{equation} and \[\] looks ugly and confusing.

Precision is preferable to rapidness. And, what could be more confusing than $$...$$?. At least \[...\] gives you the idea of opening and closing an environment.